--- a/tests/src/addCollectionAdmin.test.ts
+++ b/tests/src/addCollectionAdmin.test.ts
@@ -112,18 +112,18 @@
       ];
       const collectionId = await createCollectionExpectSuccess();
 
-      const chainLimit = await api.query.nft.chainLimit() as unknown as { collections_admins_limit: BN };
-      const chainLimitNumber = chainLimit.collections_admins_limit.toNumber();
-      expect(chainLimitNumber).to.be.equal(5);
+      const chainLimits: any = await api.query.nft.chainLimit();
+      const chainAdminLimit = chainLimits.CollectionAdminsLimit.toNumber();
+      expect(chainAdminLimit).to.be.equal(5);
 
-      for (let i = 0; i < chainLimitNumber; i++) {
+      for (let i = 0; i < chainAdminLimit; i++) {
         const changeAdminTx = api.tx.nft.addCollectionAdmin(collectionId, accounts[i]);
         await submitTransactionAsync(Alice, changeAdminTx);
         const adminListAfterAddAdmin: any = (await api.query.nft.adminList(collectionId));
         expect(adminListAfterAddAdmin).to.be.contains(accounts[i]);
       }
 
-      const tx = api.tx.nft.addCollectionAdmin(collectionId, accounts[chainLimitNumber]);
+      const tx = api.tx.nft.addCollectionAdmin(collectionId, accounts[chainAdminLimit]);
       await expect(submitTransactionExpectFailAsync(Alice, tx)).to.be.rejected;
     });
   });